Update release notes.

Update package metadata.

This is version 0.4.1.

This is version 0.4.0.

This is version 0.3.3.

This is version 0.3.2.

This is version 0.3.1.

This is version 0.3.0.

Reword some comments.

This is version 0.2.1.

State in the readme that implementing incremental build support on multi-weaver projects is of low priority.

This is version 0.2.0.

Add a NuGet package description.
Better document the fWeave parameter in Weaver.Weave.